Abstract
Hitherto the zinc sulphide material required for luminescent phosphors has usually been obtained by the reaction between a zinc salt and hydrogen sulphide. In this paper we report a new method of preparation of zinc sulphide by the reaction between thiourea and a zinc salt in an alkaline medium, at optimum conditions of pH. The zinc sulphide precipitate obtained under varying conditions of pH has been characterized by the methods of X-ray diffraction, electron microscopy and diffraction, optical microscopy, magnetic susceptibility, diffuse reflectance and density. A very important point which came out of these investigations is that with varying pH for the precipitating conditions, varying degrees of non-stoichiometry have been obtained. All these aspects have been discussed in terms of interstitial zinc atoms or Zn+ ions and electrons in anion vacancies.
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References
A. L. Smith,J. Electrochem. Soc.,93 (1948) 324.
W. Van Gool,Philips Res. Rept. Suppl.,3 (1961) 6.
A. A. Bundel and G. V. Zhukov,Opt. Spectrosc. USSR,18 (1965) 270.
F. A. Kröger and J. M. Dikhoff,J. Electrochem. Soc.,93 (1948) 156.
G. R. Levy and C. G. Fontana,Attiv. Accad. Zag. Lincei,7 (1928) 502.
T. V. Kramareva, L. A. Kosareva and V. M. Schulman, Khalkogenidy (Svoista, Methody Poluch. Primen), Mater Seminara, Ist Kiev (1965) 86.
French Patent Number 1388522 (1965).
USSR Patent Number 276929 (1970).
Indian Patent Number 126439 (1971).
L. F. Bates, ‘Modern Magnetism’, Cambridge University Press, London (1963).
C. F. French and D. Harrison,J. Chem. Soc., Part III, (1953) 2538.
R. N. G. Wyckoff, ‘Crystal Structure’, Chapter III, p. 19 (John Wiley, Interscience, New York) (1922).
W. Gerlach,Phys. Z.,23 (1922) 114.
L. Weber,Z. Krist.,57 (1922) 398.
F. A. Kröger and J. M. Dikhoff,J. Electrochem. Soc.,99 (1952) 144.
National Bureau of Standards Circular 539, Vol. II.
J. H. Gisolf,Trans. Faraday Soc.,35 (1939) 90.
Peter Pringsheim, ‘Fluorescence and Phosphorescence’, John Wiley Interscience, New York (1949).
Charles Kittel, ‘Introduction to Solid State Physics’, Asia Publishing House, London (1962).
Aldert van der Ziel, ‘Solid State Physical Electronics’, Macmillan, London (1958).
Frederic Seitz, ‘The Modern Theory of Solids’, McGraw-Hill, New York (1940).
V. S. Kulkarni and D. S. Ambardekar,J. Shivaji Univ.,2 (1969) 63.
F. Seitz,Trans. Faraday Soc.,35 (1939) 98.
P. Kubulka, and F. Munk,Z. tech. Physik.,12 (1931) 593.
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Kurian, A., Suryanarayana, C.V. Studies on a new method of preparation of zinc sulphide useful for luminescent phosphors. J Appl Electrochem 2, 223–229 (1972). https://doi.org/10.1007/BF02354980
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DOI: https://doi.org/10.1007/BF02354980